Sierra 18-8910 Water Pump Impeller for Yamaha Outboard 6HP 8HP 9.9HP

The Sierra 18-8910 is a premium-quality replacement water pump impeller designed for Yamaha 4-stroke outboard motors. This impeller is a critical component of your engine's cooling system, ensuring proper water circulation to prevent overheating and maintain optimal engine performance.

Key Features:

• Constructed from durable neoprene and hardened nylon for long-lasting reliability in harsh marine environments
• 6-blade design with precise dimensions: 53mm (2.09") overall diameter, 13.9mm (0.55") height, and 12mm (0.47") shaft diameter
• Direct OEM replacement quality that meets or exceeds original equipment specifications
• Engineered for reliable performance in demanding saltwater and freshwater applications

Compatibility:

Fits Yamaha 4-stroke outboard motors: 6HP, 8HP, and 9.9HP models including F6, F6ML, F6MS, F8, F8ML, F8MS, F6AM, F8CM, F8LM, F8L, F8S, F9.9, F9.9L, and F9.9S.

OEM Cross-Reference Numbers:

• Yamaha: 68T-44352-00-00
• Mallory: 9-45614
• CEF: 500368

Regular impeller replacement is essential for maintaining your outboard's cooling system efficiency. Marine technicians recommend inspecting and replacing impellers annually or every 100-200 hours of operation to prevent costly engine damage from overheating.